Re: "svc: unknown version (3)" when CONFIG_NFSD_V4=y

[Fengguang Wu <fengguang.wu@gmail.com>]

On Wed, Jan 10, 2007 at 05:01:23PM +1100, Neil Brown wrote:
> On Friday January 5, fengguang.wu@gmail.com wrote:
> > Hi Neil,
> > 
> > NFS mounting succeeded, but the kernel gives a warning.
> > I'm running 2.6.20-rc2-mm1.
> > 
> > # mount -o vers=3 localhost:/suse /mnt
> > [  689.651606] svc: unknown version (3)
> > # mount | grep suse
> > localhost:/suse on /mnt type nfs (rw,nfsvers=3,addr=127.0.0.1)
> > 
> > Any clues about it?
> 
> Weird.
> 
> Please try this patch.  It should provide more useful information.
> 
> NeilBrown
> 
> Signed-off-by: Neil Brown <neilb@suse.de>
> 
> ### Diffstat output
>  ./net/sunrpc/svc.c |    3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff .prev/net/sunrpc/svc.c ./net/sunrpc/svc.c
> --- .prev/net/sunrpc/svc.c	2007-01-10 16:58:14.000000000 +1100
> +++ ./net/sunrpc/svc.c	2007-01-10 16:59:55.000000000 +1100
> @@ -910,7 +910,8 @@ err_bad_prog:
>  
>  err_bad_vers:
>  #ifdef RPC_PARANOIA
> -	printk("svc: unknown version (%d)\n", vers);
> +	printk("svc: unknown version (%d for prog %d, %s)\n", 
> +	       vers, prog, progp->pg_name);
>  #endif
>  	serv->sv_stats->rpcbadfmt++;
>  	svc_putnl(resv, RPC_PROG_MISMATCH);

root ~# mount localhost:/suse /mnt
[  132.678204] svc: unknown version (3 for prog 100227, nfsd)

I've confirmed that 2.6.20-rc2-mm1, 2.6.20-rc3-mm1, 2.6.19-rc6-mm1 all
have this warning, while 2.6.17-2-amd64 is good.

Thanks,
Wu